PHOTOSYNTHESIS

[noun] [U] - the process by which a plant uses the energy from the light of the sun to produce its own food from water and carbon dioxideThese plants have an impressive spread of leaves to enable them to produce enough food by photosynthesis to support their size.The scientists say that although the sunlight falling on Mars is only about 43% of that reaching the Earth, this is enough for photosynthesis.Plants' happy knack of swapping carbon dioxide for oxygen during photosynthesis is one of nature's ways of keeping the planet healthy.